My thoughts on this is,
back when these engines/ drives
came out, they would only offer them
with 1:36 gear ratio's to prevent
Retarded timing= less low end torque,
easier on the drive, when coming out of the
As I recall the module only has 20* of advance
built in, that gives you a total of 28* full,
I had a 24' boat with the engine mentioned,
it was relatively light 3600#'s, but it was a pig
out of the hole
I set my advance up to 14* initial, giving my
34* total, made a big difference on acceleration.
I didn't run premium either, I didn't notice any
detonation, I ran this for 5 years,no problem.
hope this helps.